Option D Geophysical hazards: Hazard risk and resilience
15 revision questions with answers for Option D Geophysical hazards: Hazard risk and resilience, marked SL and HL. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Logarithmic measure of the energy released by an earthquake, which has replaced Richter?
- Moment magnitude scaleRight answer
- Modified Mercalli scale
- Volcanic Explosivity Index
- Saffir–Simpson scale
What this set covers
Measuring hazards and coping with them are the themes. Moment magnitude and Modified Mercalli scales, the Volcanic Explosivity Index, pyroclastic flows, lahars, liquefaction, tsunamis, the Park model, retrofitting and seismic gaps are included.
- Common mix-up
- Students often mix up the moment magnitude scale and the Modified Mercalli scale: one measures energy released, the other ranks observed effects on people and buildings from I to XII.
- Revision tip
- Write the risk equation from memory, including capacity, then match each management term in the set to the part of the equation it changes.
All 15 questions and answers
Logarithmic measure of the energy released by an earthquake, which has replaced Richter?
Answer: Moment magnitude scale
Ranking from I to XII of an earthquake's observed effects on people and buildings?
Answer: Modified Mercalli scale
0–8 logarithmic scale of eruption size, based on ejected volume and plume height?
Answer: Volcanic Explosivity Index
Fast-moving avalanche of hot gas, ash and rock down a volcano's flanks?
Answer: Pyroclastic flow
Volcanic mudflow of ash and water, often triggered by heavy rain or melting ice?
Answer: Lahar
Waterlogged sandy ground losing strength and flowing like a fluid during earthquake shaking?
Answer: Liquefaction
Series of ocean waves caused by sudden displacement of the sea floor?
Answer: Tsunami
Risk = hazard × vulnerability, divided by…?
Answer: Capacity
Graph of quality of life through relief, rehabilitation and reconstruction after a disaster?
Answer: Park model
Hazard perception that losses are inevitable or God's will, so little can be done?
Answer: Fatalism
Restricting development in high-risk areas identified on hazard maps?
Answer: Land-use zoning
Strengthening existing buildings so they better withstand earthquake shaking?
Answer: Retrofitting
Hazard event whose impacts exceed a community's ability to cope using its own resources?
Answer: Disaster
Effects such as fires, landslides and tsunamis that follow an earthquake's ground shaking?
Answer: Secondary hazards
Section of an active fault with no recent large earthquake, thought likely to rupture next?
Answer: Seismic gap
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.